Apparatus for vulcanizing tire-shoes.



C. F. ADAMSON.

APPARATUS FOR VULCANIZING TIRE SHOES.

APPLICATION FILED JULY 19, I912- RENEWED JAN- 15. I915.

1,150,922. Patented Aug. 24,1915.

EINITED STATES UFFIQE.

. CECIL F. ADAMSON, OF EAST PALESTINE, OHIO, ASSIGNOR 'IJO UNITED STATESRUBBER COMPANY, A CORPORATION OF NEW JERSEY.

APPARATUS FOR VULCANIZING TIRE-SHOES,

Specification of Letters Patent.

Patented Aug. 24, 1915.

Application filed July 19, 1912, Serial No. 710,441. Renewed January 15,1915. Serial No. 2,495.

To all whom it may concern:

Be it known that I, CECIL F. ADAMSON, a citizen of the United States,residing at East Palestine, in the county of Columbiana, State of Ohio,have invented new and useful Improvements in Apparatus for Vulcaniz ingTire-Shoes, of which the following is a specification.

Thisinvention relates to rubber articles and more particularly apparatusfor vulcanizing'rubber articles, and more particularly the outer shoesor casings of pneumatic tires, and has for its object to provide certainimprovements in the same as will be hereinafter more definitely pointedout and claimed.

Heretofore tire shoes orcasings have been vulcanized in one of twoways,viz., by subjecting the built up article to the vulcanizin-g heat whileclamped in a metal mold encompassing the entire tire; or by Wrapping thebuilt up article in a textile covering under considerable tension,whereby the rubber composing the tread surface of the t1re will beprevented from running under the softening action of the heat before thevulcanizing temperature is reached. Of these methods the first isobjectionable because of the fact that the gases in the rubber compoundliberated by the vulcanizing heat are trapped by the metal mold in whichthe shoe is clamped, thereby causing blisters to form on the surface ofthe shoe; while in the method using textile wrappings the cost isobjectionable,

the method requiring highly skilled labor' and constantly destroying thetextile wrappings.

objectionable features of both of the above described methods, which Iaccomplish by substituting for the metal mold in the one -'instance, andthe textile wrappings in the other instance, a support of comminuted"material which will be unaffected by the vulcanizing heat, such asmolders sand, powdered soapstone or similar material, the

same preferably surrounding the tread surface of the tire only, andwhich will act not only to maintain the rubber compound in its shapeunder the gradually increasing heat in the vulcanizer, but will alsopermit the escape of any gases generated therein under the vulcanizingheat.

In the drawing accompanying this speci My present invention aims toeliminate the fication, the figure is a vertical sectional view of myimproved apparatus.

Inthe said drawing the reference numeral 1 denotes asuitable metal coreupon which the carcass of the tire shoe is first built up,

and which may be formed hollow, as shown,

to permit access thereinto of the vulcanizing medium through a series ofapertures 2 therein.

therein of suitable shape to receive, form and give shape to the beadsor ribs 6 at the margins of this type of tire shoe. Said clampingmembers are suitably clamped together by means of bolts 7 and the lowermember 4 is extended annularly at 8 to form a pocket surrounding thetread surface 9 of the tire shoe, the upper edge of said extension 8being flush with the upper edge of the extension 10 of clamping member3, as shown.

In practice the built up tire shoe is positioned between the members 3and 4, which are then clamped together by means of the bolts 7, whichwill clamp and shape the blends or ribs (5 of the shoe as well as thebodyof the shoe for a short distance in the usual manner. The pocketformed by the extensions 8 and 10 is then filled with any faces of theextensions 8 and 10 near their upper edges with a series of annularflanges 11, whose purpose is to aid in retaining the sand or othermaterial within the chamber.

In employing the term comminuted material in the claims hereto appendedI wish to be understood as embracing any form of finely divided materialwhich will be unaffected by the vulcanizing medium and which willmaintain the rubber compound composing the tire shoe tread in form underthe vulcanizing operation.

Having thus described my invention, what I claim as new and desire tosecure by Let ters Iatent is:

1. In apparatus of the character described, means for holding andsupporting a tire shoe or casing in the form to be perman\ently heldthereby, but leaving. the tread portion thereof exposed, and a packingof coinminuted material for enveloping and supporting said treadsurface.

2. In apparatus of the characterdescribed, a core adapted for insertionwithin a tire shoe or casing, means for clamping the margins of saidcasing in proper relation to said core while leaving the tread thereofexposed, and

a packing'of comminuted material applied to said tread surface tosupport the same during the vulcanizing; operation.

3. In apparatus of the character described, a core adapted foninsertionwithin a tire shoe. or casing, coiiperatimg members for clamping themargins of said casing in proper relation to said core while leaving thetread surface thereof exposed, an extension on one of said membersforming a pocket inclosing said exposed tread surface, and a packing ofcoinminuted material in said pocket and in contact with said treadsurface to support the latter in form under the vulcanizing operation.

4.. In apparatus of the character described, a core adapted forinsertion within a tire shoe or easing, cooperatii'ig members forelampinc the margins of said casing in proper relation to said corewhile leaving the tread surface thereof exposed, an extension on one ofsaid members forming a pocket around said tread surface, a cooperatingextension on said other member, and a packinc of comminuted material insaid pocket and in contact with said tread to support the latter in formunder the vulcanizing oper: tion.

In testimony whereof, I have hereunto set my hand in the presence of twosubscribing witnesses.

CECIL F. ADAMSON. Witnesses:

Evi-zm-z'rr Ii. IJYUX, (LARA L. Monaow.

Copies of this patent may lie obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. C.

